Dovecot 2.3->2.4 and pigeonhole issues

[technosf]

It looks as though Dovecot is moving from 2.3 to 2.4 and requires a new pigeonhole build, with the prior versions being labled with the postfix (no pun) 23.

The pigeonhole23 version is 0.5.21.1-2 with conflicts dovecot>=2.4, pigeonhole, dovecot-sieve, pigeonhole-hg
Pigeonhole version is 0.5.21.1-1

Upgrading gives error: failed to prepare transaction (could not satisfy dependencies)
:: installing dovecot (2.4.2-3) breaks dependency 'dovecot=2.3.21.1' required by pigeonhole

Installed are:
local/dovecot 2.3.21.1-3
An IMAP and POP3 server written with security primarily in mind
local/pigeonhole 0.5.21.1-1
Sieve implementation for Dovecot